O09.21 - Supervision of pregnancy with history of pre-term labor O09.2 - Supervision of pregnancy with other poor reproductive or obstetric history O09.21 - Supervision of pregnancy with history of pre-term labor
O09.211 - Supervision of pregnancy with history of pre-term labor, first trimester O09.212 - Supervision of pregnancy with history of pre-term labor, second trimester O09.213 - Supervision of pregnancy with history of pre-term labor, third trimester O09.219 - Supervision of pregnancy with history of pre-term labor, unspecified trimester